*cpu0: uvm_fault(0xfffffd806e05d3d0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x2e613666ba0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c505840 rbx 0 rdx 0 rcx 0xffff80003c441228 rax 0x32 r8 0xffff80003c505770 r9 0x80713 acpi_pdirpa+0x6c584 r10 0xbfb17fbab7e1c83 r11 0xf078839c0551f11c r12 0 r13 0 r14 0xffff80003c441228 r15 0 rip 0xffffffff82cd23ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c5057c0 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=314080 pid=54062 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c440558,0xffffffff839716b0 process=0xffff80003ac23358 user=0xffff80003c500000, vmspace=0xfffffd806be2f5c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54062 523533 47188 0 2 0 syz-executor 54062 394432 47188 0 2 0x4000000 syz-executor *54062 314080 47188 0 7 0x4000000 syz-executor 76684 454961 67023 0 2 0 syz-executor 76684 38578 67023 0 3 0x4000080 fsleep syz-executor 76684 110151 67023 0 3 0x4000080 fsleep syz-executor 25744 65643 69102 0 3 0 vmmaplk syz-executor 25744 27437 69102 0 3 0x4000080 fsleep syz-executor 25744 172185 69102 0 2 0x4000000 syz-executor 25744 64210 69102 0 3 0x4000080 fsleep syz-executor 91040 321117 18659 0 3 0x80 nanoslp syz-executor 91040 461448 18659 0 3 0x4000080 rest syz-executor 91040 144661 18659 0 3 0x4000080 fsleep syz-executor 4757 459726 0 0 3 0x14280 nfsidl nfsio 19147 92157 0 0 3 0x14280 nfsidl nfsio 39490 402538 0 0 3 0x14280 nfsidl nfsio 62819 200011 0 0 3 0x14280 nfsidl nfsio 9197 258296 0 0 3 0x14280 nfsidl nfsio 70239 107971 0 0 3 0x14280 nfsidl nfsio 86542 437073 0 0 3 0x14280 nfsidl nfsio 62390 304413 0 0 3 0x14280 nfsidl nfsio 728 87296 0 0 3 0x14280 nfsidl nfsio 97997 158459 0 0 3 0x14280 nfsidl nfsio 97299 2025 0 0 3 0x14280 nfsidl nfsio 55615 206261 0 0 3 0x14280 nfsidl nfsio 91677 294021 0 0 3 0x14280 nfsidl nfsio 98039 405216 0 0 3 0x14280 nfsidl nfsio 97270 320707 0 0 3 0x14280 nfsidl nfsio 8972 327959 0 0 3 0x14280 nfsidl nfsio 85442 154706 0 0 3 0x14280 nfsidl nfsio 93936 256243 0 0 3 0x14280 nfsidl nfsio 38743 108678 0 0 3 0x14280 nfsidl nfsio 61943 522280 0 0 3 0x14280 nfsidl nfsio 76611 36439 1 0 3 0x100083 ttyin getty 72081 500532 0 0 3 0x14200 bored sosplice 12319 340056 11543 0 3 0x100082 sbwait arp 11543 64989 87601 0 3 0x10008a sigsusp sh 67023 452846 37607 0 3 0x82 nanoslp syz-executor 25659 469865 37607 0 3 0x82 nanoslp syz-executor 87601 500825 37607 0 3 0x82 wait syz-executor 8013 442834 37607 0 3 0x82 wait syz-executor 59209 90757 37607 0 2 0x2 syz-executor 47188 294367 37607 0 3 0x82 nanoslp syz-executor 69102 397592 37607 0 3 0x82 nanoslp syz-executor 18659 48330 37607 0 3 0x82 nanoslp syz-executor 37607 143603 29595 0 3 0x82 kqread syz-executor 29595 259138 21651 0 3 0x10008a sigsusp ksh 21651 127346 44087 0 3 0x98 kqread sshd-session 44087 374099 42671 0 3 0x92 kqread sshd-session 42671 145602 1 0 3 0x88 kqread sshd 65555 125582 43268 74 3 0x1100092 bpf pflogd 43268 347904 1 0 3 0x80 sbwait pflogd 16266 368146 21795 73 3 0x1100090 kqread syslogd 21795 446968 1 0 3 0x100082 sbwait syslogd 22914 37655 1 0 3 0x100080 kqread resolvd 19268 94337 67170 77 3 0x100092 kqread dhcpleased 79127 444907 67170 77 3 0x100092 kqread dhcpleased 67170 173514 1 0 3 0x80 kqread dhcpleased 47819 105117 0 0 3 0x14200 bored smr 964 29417 0 0 3 0x14200 pgzero zerothread 421 332638 0 0 3 0x14200 aiodoned aiodoned 56825 442013 0 0 3 0x14200 syncer update 57112 49796 0 0 3 0x14200 cleaner cleaner 82595 405924 0 0 3 0x14200 reaper reaper 8957 387328 0 0 3 0x14200 pgdaemon pagedaemon 91426 234373 0 0 3 0x14200 bored viomb 73240 228437 0 0 3 0x40014200 acpi0 acpi0 45155 227992 0 0 3 0x40014200 idle1 41746 301231 0 0 3 0x14200 bored softnet3 43653 463363 0 0 3 0x14200 bored softnet2 24960 372038 0 0 3 0x14200 bored softnet1 21749 520816 0 0 3 0x14200 bored softnet0 29253 394737 0 0 3 0x14200 bored systqmp 54126 436010 0 0 3 0x14200 bored systq 10903 237537 0 0 3 0x14200 tmoslp softclockmp 92463 174225 0 0 3 0x40014200 tmoslp softclock 51998 336374 0 0 3 0x40014200 idle0 1 195764 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex vmmpepl r = 0 (0xffffffff83977838) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 uvm_mapent_alloc+0x35a sys/uvm/uvm_map.c:-1 #5 uvm_mapanon+0x275 sys/uvm/uvm_map.c:-1 #6 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1031 #7 sys_mmap+0xa96 sys/uvm/uvm_mmap.c:426 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 25744 (syz-executor) thread 0xffff80002a2a6020 (172185) shared rwlock vmmaplk r = 0 (0xfffffd806be2fe40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_read+0x155 sys/kern/spec_vnops.c:215 #5 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x230 sys/kern/sys_generic.c:252 #8 sys_pread+0xae sys/kern/vfs_syscalls.c:3311 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11173K 11667K 166960K 12090 0 pcb 18 12K 12K 166960K 68 0 rtable 200 6K 6K 166960K 380 0 pf 41 18K 21K 166960K 60 0 ifaddr 39 6K 7K 166960K 48 0 ifgroup 64 2K 2K 166960K 66 0 sysctl 1 1K 1K 166960K 1 0 counters 70 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1536 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1409 89K 89K 166960K 1821 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 93K 166960K 427 0 sigio 0 0K 0K 166960K 10 0 proc 72 91K 140K 166960K 550 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 32 0 in_multi 69 5K 6K 166960K 107 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 400 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 266 179K 191K 166960K 5629 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 45 90K 105K 166960K 1510 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 79 0 NDP 14 0K 1K 166960K 29 0 temp 54 8681K 8746K 166960K 15440 0 kqueue 14 22K 26K 166960K 70 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 57 0 51 1 0 1 1 0 8 0 rtentry 176 115 0 26 5 0 5 5 0 8 0 unpcb 144 163 0 144 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 130 0 126 8 0 8 8 0 8 7 arp 128 19 0 4 1 0 1 1 0 8 0 inpcb 384 335 0 327 8 0 8 8 0 8 6 nd6 144 25 0 7 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 2 0 1 1 0 1 1 0 8 0 pppxif 1504 1 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 4 0 2 1 0 1 1 0 482 0 pffrnode 88 4 0 2 1 0 1 1 0 8 0 pffrent 40 8 0 6 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 47 0 4 1 0 1 1 0 8 0 pfstkey 128 48 0 3 2 0 2 2 0 8 0 pfstate 384 46 0 3 5 0 5 5 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 429 0 90 26 0 26 26 0 8 1 art_table 32 431 0 90 4 0 4 4 0 8 0 art_node 16 113 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2188 0 678 95 0 95 95 0 8 0 ffsino 288 2188 0 678 109 0 109 109 0 8 0 nchpl 144 2783 0 1086 63 0 63 63 0 8 0 uvmvnodes 80 2555 0 0 53 0 53 53 0 8 0 vnodes 216 2555 0 0 142 0 142 142 0 8 0 namei 1024 8724 0 8724 2 1 1 2 0 8 1 percpumem 16 51 0 1 1 0 1 1 0 8 0 kstatmem 264 30 0 2 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scxspl 216 8818 0 8818 9 1 8 8 1 8 8 plimitpl 152 87 0 70 1 0 1 1 0 8 0 sigapl 424 750 0 678 9 0 9 9 0 8 0 futexpl 64 4899 0 4894 1 0 1 1 0 8 0 knotepl 120 315 0 0 10 0 10 10 0 8 0 kqueuepl 224 174 0 164 3 0 3 3 0 8 2 pipepl 336 131 0 104 3 0 3 3 0 8 0 fdescpl 520 711 0 678 3 0 3 3 0 8 0 filepl 160 3680 0 3454 15 0 15 15 0 8 5 lockfpl 104 101 0 99 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 538 0 525 1 0 1 1 0 8 0 zombiepl 144 681 0 678 1 0 1 1 0 8 0 processpl 1192 750 0 678 6 0 6 6 0 8 0 procpl 656 1239 0 1158 8 0 8 8 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 728 561 0 528 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 107 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 61 0 0 2 0 2 2 0 8 0 mbufpl 256 229 0 0 14 0 14 14 0 8 0 bufpl 280 2924 0 124 200 0 200 200 0 8 0 anonpl 32 6645 0 0 54 0 54 54 0 246 0 amapchunkpl 152 17928 0 17264 26 0 26 26 0 158 0 amappl16 200 2558 0 2469 9 3 6 6 0 8 1 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 113 0 100 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1386 0 1351 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 5 0 5 2 2 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 136 0 123 1 0 1 1 0 8 0 amappl6 120 176 0 172 1 0 1 1 0 8 0 amappl5 112 121 0 111 1 0 1 1 0 8 0 amappl4 104 331 0 311 1 0 1 1 0 8 0 amappl3 96 3264 0 3142 4 0 4 4 0 8 0 amappl2 88 623 0 558 2 0 2 2 0 8 0 amappl1 80 9344 0 8712 15 0 15 15 0 8 0 amappl 88 4900 0 4714 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 711 0 678 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 711 0 678 1 0 1 1 0 8 0 vmmpekpl 168 7307 0 7266 3 0 3 3 0 8 0 vmmpepl 168 50791 0 48662 94 0 94 94 0 357 0 vmsppl 480 710 0 678 5 0 5 5 0 8 0 rwobjpl 72 18635 0 15013 67 0 67 67 0 8 1 pdppl 4096 1430 0 1356 108 34 74 88 0 8 0 pvpl 32 13348 0 0 108 0 108 108 0 265 0 pmappl 256 710 0 678 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 38 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837eaff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff83375601) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c4ff7c0) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c4ff7c0) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c4ff7c0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147f000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 end trace frame: 0xffff80003c4ff8f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837eaff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff83375601) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c4ff7c0) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c4ff7c0) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c4ff7c0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147f000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,1,2000,ffff80003c440a78) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff80003c440a78) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c4ff970) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8063f2f640,1,fffffd807f7d27b8,ffff80003c440a78) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806812fc28,ffff80003c440a78) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806812fc28,ffff80003c440a78) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806812fc28,ffff80003c440a78) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806812fc28,ffff80003c440a78) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff80003c440a78) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80003c440a78,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c440a78,ffff80003c4ffce0,ffff80003c4ffc30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4ffce0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ffce0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77c8d4d80500, count: -25 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x680 savectx() at savectx+0xae end of kernel end trace frame: 0x2e613666ba0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x2e613666ba0, count: -1